Revert "THRIFT-4982 Remove deprecated C# bindings from the code base"
Only compiler, test, lib and tutorial code.
diff --git a/lib/csharp/src/Collections/TCollections.cs b/lib/csharp/src/Collections/TCollections.cs
new file mode 100644
index 0000000..84afb6a
--- /dev/null
+++ b/lib/csharp/src/Collections/TCollections.cs
@@ -0,0 +1,94 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+using System;
+using System.Collections;
+
+namespace Thrift.Collections
+{
+ public class TCollections
+ {
+ /// <summary>
+ /// This will return true if the two collections are value-wise the same.
+ /// If the collection contains a collection, the collections will be compared using this method.
+ /// </summary>
+ public static bool Equals (IEnumerable first, IEnumerable second)
+ {
+ if (first == null && second == null)
+ {
+ return true;
+ }
+ if (first == null || second == null)
+ {
+ return false;
+ }
+ IEnumerator fiter = first.GetEnumerator ();
+ IEnumerator siter = second.GetEnumerator ();
+
+ bool fnext = fiter.MoveNext ();
+ bool snext = siter.MoveNext ();
+ while (fnext && snext)
+ {
+ IEnumerable fenum = fiter.Current as IEnumerable;
+ IEnumerable senum = siter.Current as IEnumerable;
+ if (fenum != null && senum != null)
+ {
+ if (!Equals(fenum, senum))
+ {
+ return false;
+ }
+ }
+ else if (fenum == null ^ senum == null)
+ {
+ return false;
+ }
+ else if (!Equals(fiter.Current, siter.Current))
+ {
+ return false;
+ }
+ fnext = fiter.MoveNext();
+ snext = siter.MoveNext();
+ }
+
+ return fnext == snext;
+ }
+
+ /// <summary>
+ /// This returns a hashcode based on the value of the enumerable.
+ /// </summary>
+ public static int GetHashCode (IEnumerable enumerable)
+ {
+ if (enumerable == null)
+ {
+ return 0;
+ }
+
+ int hashcode = 0;
+ foreach (object obj in enumerable)
+ {
+ IEnumerable enum2 = obj as IEnumerable;
+ int objHash = enum2 == null ? obj.GetHashCode () : GetHashCode (enum2);
+ unchecked
+ {
+ hashcode = (hashcode * 397) ^ (objHash);
+ }
+ }
+ return hashcode;
+ }
+ }
+}